Browsing by Author "MCGILP, JOHN"
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Controlled in situ growth of tunable plasmonic self-assembled nanoparticle arrays
SHVETS, IGOR; MCGILP, JOHN; FLEISCHER, KARSTEN; FOX, DANIEL (2012)Self-assembled silver nanoparticle (NP) arrays were produced by deposition at glancing angles on transparent stepped Al2O3 templates. The evolution of the plasmonic resonances has been monitored using reflection anisotropy ... -
Extracting the hysteresis loops of magnetic interfaces from optical second-harmonic intensity measurements
MCGILP, JOHN; FLEISCHER, KARSTEN (2007)Surface- and interface-sensitive optical techniques, such as optical second-harmonic generation (SHG), allow the buried interfacial structure of centrosymmetric materials to be explored through thin capping layers, and ... -
The free-electron response in reflectance anisotropy spectra
MCGILP, JOHN; FLEISCHER, KARSTEN (2006)Reflectance anisotropy spectra (RAS), extended into the near infrared spectral region, of anisotropic metal islands, metal surfaces, and atomic nanowires are analyzed with respect to anisotropies in the optical response ... -
General approach to the analysis of plasmonic structures using spectroscopic ellipsometry
FOX, DANIEL; FLEISCHER, KARSTEN; SMITH, CHRISTOPHER; ZHANG, HONGZHOU; MCGILP, JOHN; SHVETS, IGOR (2013)In this article a route to analyze the full optical response of plasmonic structures is developed. First, the simple case of an anisotropic thin plasmonic layer supported on a transparent substrate is analyzed by ... -
Group V adsorbate structure on vicinal Ge(001) surfaces determined from the optical spectrum
PATTERSON, CHARLES; MCGILP, JOHN (2017) -
In situ characterization of one-dimensional plasmonic Ag nanocluster arrays
SHVETS, IGOR; FLEISCHER, KARSTEN; MCGILP, JOHN (2011)One-dimensional Ag nanoparticle arrays have been grown on step-bunched vicinal Al2O3 in ultrahigh vacuum using deposition at a glancing angle. The structures grown showed a strong optical anisotropy in the visible region ... -
In-situ characterisation of one-dimensional plasmonic Ag nanocluster arrays
SHVETS, IGOR; MCGILP, JOHN; FLEISCHER, KARSTEN (2011)One-dimensional Ag nanoparticle arrays have been grown on step-bunched vicinal Al2O3 in ultrahigh vacuum using deposition at a glancing angle. The structures grown showed a strong optical anisotropy in the visible region ... -
Magnetic second-harmonic generation from interfaces and nanostructures
MCGILP, JOHN; FLEISCHER, KARSTEN; CUNNIFFE, JOHN PATRICK (2010)Magneto-optic techniques provide non-contact and non-destructive characterization of magnetic materials. This includes embedded magnetic nanostructures, which are accessible due to the large penetration depth of optical ... -
Magnetic second-harmonic generation from the terraces and steps of aligned magnetic nanostructures grown on low symmetry interfaces
MCGILP, JOHN; FLEISCHER, KARSTEN; CUNNIFFE, JOHN PATRICK (2008)Aligned magnetic nanostructures grown on low symmetry interfaces are generally inhomogeneous, with different magnetic species, such as terrace and step atoms, contributing to the overall magnetic response from the interfacial ... -
Manipulating and probing the growth of plasmonic nanoparticle arrays using light
BULFIN, BRENDAN; FLEISCHER, KARSTEN; USOV, VICTOR; MCGILP, JOHN; SHVETS, IGOR (2013)Highly ordered self-assembled silver nanoparticle (NP) arrays have been produced by glancing angle deposition on faceted c-plane Al2O3 templates. The NP shape can be tuned by changing the substrate temperature during ... -
New evidence for the influence of step morphology on the formation of Au atomic chains on vicinal Si(111) surfaces
MCGILP, JOHN (2010)Gold atomic chain structures that grow on singular and vicinal Si(111) surfaces have attracted considerable interest as model systems for exploring quasi-one-dimensional metallic behaviour. The structure of the prototypical ... -
Optical and phonon excitations of modified Pandey chains at the Si(111)-2×1 surface
PATTERSON, CHARLES; MCGILP, JOHN (2011)The modified Pandey π-bonded chain structure for the (2×1) reconstruction of the Si(111) surface has two nearly degenerate structures in which one or the other of two atoms in the π chain is the outermost atom at the ... -
Optical characterisation of plasmonic nanostructures on planar substrates using second harmonic generation
MCGILP, JOHN; FLEISCHER, KARSTEN; SHVETS, IGOR (2015) -
Optical characterisation of plasmonic nanostructures on planar substrates using second?harmonic generation
SMITH, CHRISTOPHER; MCGILP, JOHN; SHVETS, IGOR; FLEISCHER, KARSTEN (2015) -
Optical Fingerprints of Si Honeycomb Chains and Atomic Gold Wires on the Si(111)-(5x2)-Au Surface
MCGILP, JOHN (2013)The intensively studied Si(111)-(5×2)-Au surface is reexamined using reflectance anisotropy spectroscopy and density functional theory simulations. We identify distinctive spectral features relating directly to local ... -
Optical reflectance anisotropy of buried Fe nanostructures on vicinal W(110)
MCGILP, JOHN; FLEISCHER, KARSTEN; SMITH, CHRISTOPHER (2007)The optical anisotropy of Au protected Fe layers grown on a vicinal W(110) surface has been investigated using reflectance anisotropy spectroscopy (RAS). Iron nanostripes formed at submonolayer coverage, as well as Fe ... -
Probing surface and interface structure using optics
MCGILP, JOHN (2010)Optical techniques for probing surface and interface structure are introduced and recent developments in the field are discussed. These techniques offer significant advantages over conventional surface probes: all pressure ... -
Probing the out-of-plane optical response of plasmonic nanostructures using spectroscopic ellipsometry
SHVETS, IGOR; MCGILP, JOHN; FLEISCHER, KARSTEN; SMITH, CHRISTOPHER (2011)A simplified approach to investigate the out-of-plane response of plasmonic nanostructures using spectroscopic ellipsometry (SE) is presented. One-dimensional self-assembled arrays of Ag nanoparticles (NP?s) were grown on ... -
Reflectance anisotropy spectroscopy of magnetite (110) surfaces
MAUIT, OZHET; SMITH, CHRISTOPHER; FLEISCHER, KARSTEN; FARRELL, LEO; MCGILP, JOHN; SHVETS, IGOR (2014)Reflectance anisotropy spectroscopy (RAS) has been used to measure the optical anisotropies of bulk and thin-film Fe3O4(110) surfaces. The spectra indicate that small shifts in energy of the optical transitions, ...